diff --git a/debian/shadowsocks.default b/debian/shadowsocks.default
index 5b60264b..eb6e15a6 100644
--- a/debian/shadowsocks.default
+++ b/debian/shadowsocks.default
@@ -18,3 +18,6 @@ DAEMON_ARGS=""
 # User and group to run the server as
 USER=root
 GROUP=root
+
+# Number of maximum file descriptors
+MAXFD=1024
diff --git a/debian/shadowsocks.init b/debian/shadowsocks.init
index a1e52a2b..29322534 100644
--- a/debian/shadowsocks.init
+++ b/debian/shadowsocks.init
@@ -45,19 +45,22 @@ SCRIPTNAME=/etc/init.d/$NAME
 #
 do_start()
 {
-	# Take care of pidfile permissions
-	mkdir /var/run/$NAME 2>/dev/null || true
-	chown "$USER:$GROUP" /var/run/$NAME
+    # Modify the file descriptor limit
+    ulimit -n ${MAXFD}
 
-	# Return
-	#   0 if daemon has been started
-	#   1 if daemon was already running
-	#   2 if daemon could not be started
-	start-stop-daemon --start --quiet --pidfile $PIDFILE --chuid $USER:$GROUP --exec $DAEMON --test > /dev/null \
-		|| return 1
-	start-stop-daemon --start --quiet --pidfile $PIDFILE --chuid $USER:$GROUP --exec $DAEMON -- \
-		-c "$CONFFILE" -a "$USER" -u -f $PIDFILE $DAEMON_ARGS \
-		|| return 2
+    # Take care of pidfile permissions
+    mkdir /var/run/$NAME 2>/dev/null || true
+    chown "$USER:$GROUP" /var/run/$NAME
+
+    # Return
+    #   0 if daemon has been started
+    #   1 if daemon was already running
+    #   2 if daemon could not be started
+    start-stop-daemon --start --quiet --pidfile $PIDFILE --chuid $USER:$GROUP --exec $DAEMON --test > /dev/null \
+        || return 1
+    start-stop-daemon --start --quiet --pidfile $PIDFILE --chuid $USER:$GROUP --exec $DAEMON -- \
+        -c "$CONFFILE" -a "$USER" -u -f $PIDFILE $DAEMON_ARGS \
+        || return 2
 }
 
 #
@@ -65,70 +68,70 @@ do_start()
 #
 do_stop()
 {
-	# Return
-	#   0 if daemon has been stopped
-	#   1 if daemon was already stopped
-	#   2 if daemon could not be stopped
-	#   other if a failure occurred
-	start-stop-daemon --stop --quiet --retry=KILL/5 --pidfile $PIDFILE --name $NAME
-	RETVAL="$?"
-	[ "$RETVAL" = 2 ] && return 2
-	# Wait for children to finish too if this is a daemon that forks
-	# and if the daemon is only ever run from this initscript.
-	# If the above conditions are not satisfied then add some other code
-	# that waits for the process to drop all resources that could be
-	# needed by services started subsequently.  A last resort is to
-	# sleep for some time.
-	start-stop-daemon --stop --quiet --oknodo --retry=KILL/5 --exec $DAEMON
-	[ "$?" = 2 ] && return 2
-	# Many daemons don't delete their pidfiles when they exit.
-	rm -f $PIDFILE
-	return "$RETVAL"
+    # Return
+    #   0 if daemon has been stopped
+    #   1 if daemon was already stopped
+    #   2 if daemon could not be stopped
+    #   other if a failure occurred
+    start-stop-daemon --stop --quiet --retry=KILL/5 --pidfile $PIDFILE --name $NAME
+    RETVAL="$?"
+    [ "$RETVAL" = 2 ] && return 2
+    # Wait for children to finish too if this is a daemon that forks
+    # and if the daemon is only ever run from this initscript.
+    # If the above conditions are not satisfied then add some other code
+    # that waits for the process to drop all resources that could be
+    # needed by services started subsequently.  A last resort is to
+    # sleep for some time.
+    start-stop-daemon --stop --quiet --oknodo --retry=KILL/5 --exec $DAEMON
+    [ "$?" = 2 ] && return 2
+    # Many daemons don't delete their pidfiles when they exit.
+    rm -f $PIDFILE
+    return "$RETVAL"
 }
 
 
 case "$1" in
-  start)
-    [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC " "$NAME"
-    do_start
+    start)
+        [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC " "$NAME"
+        do_start
+        case "$?" in
+            0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+        2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+    esac
+    ;;
+stop)
+    [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
+    do_stop
     case "$?" in
-		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
-		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
-	esac
-  ;;
-  stop)
-	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
-	do_stop
-	case "$?" in
-		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
-		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
-	esac
-	;;
+        0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+    2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+esac
+;;
   status)
-       status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
-       ;;
+      status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
+      ;;
   restart|force-reload)
-	log_daemon_msg "Restarting $DESC" "$NAME"
-	do_stop
-	case "$?" in
-	  0|1)
-		do_start
-		case "$?" in
-			0) log_end_msg 0 ;;
-			1) log_end_msg 1 ;; # Old process is still running
-			*) log_end_msg 1 ;; # Failed to start
-		esac
-		;;
-	  *)
-	  	# Failed to stop
-		log_end_msg 1
-		;;
-	esac
-	;;
+      log_daemon_msg "Restarting $DESC" "$NAME"
+      do_stop
+      case "$?" in
+          0|1)
+              do_start
+              case "$?" in
+                  0) log_end_msg 0 ;;
+              1) log_end_msg 1 ;; # Old process is still running
+          *) log_end_msg 1 ;; # Failed to start
+      esac
+      ;;
   *)
-	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
-	exit 3
-	;;
+      # Failed to stop
+      log_end_msg 1
+      ;;
+    esac
+    ;;
+*)
+    echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
+    exit 3
+    ;;
 esac
 
 :
diff --git a/libasyncns/asyncns.c b/libasyncns/asyncns.c
index 90cc370f..b200d96e 100644
--- a/libasyncns/asyncns.c
+++ b/libasyncns/asyncns.c
@@ -717,8 +717,12 @@ static void* thread_worker(void *p) {
                 FD_SET(in_fd, &fds);
 
                 if (select(in_fd+1, &fds, NULL, NULL, &tv) < 0) {
-                    perror("test");
-                    break;
+                    if (errno == EAGAIN || errno == EINTR) {
+                        continue;
+                    } else {
+                        perror("error on select");
+                        break;
+                    }
                 }
             }